Frequently Asked Questions

Almost always this is caused by your printer or PDF viewer rescaling the document. Make sure you print at 100% / Actual Size and that "Fit to Page", "Shrink to Printable Area", or similar options are turned off. In Chrome, look for the Scale dropdown in the print dialog.

In Chrome/Edge: open the PDF → Ctrl+P → set Scale to 100 or choose "Actual Size". In Adobe Acrobat: File → Print → under Page Sizing choose Actual Size. On Mac Preview: File → Print → uncheck "Scale to fit". The Download page has a full step-by-step guide.

Most printers have a non-printable margin of around 5–10mm. Use the Margin Guides toggle in the editor (left sidebar) to visualise this safe zone, and keep important content inside it. Alternatively, choose a slightly larger paper size.

300 dpi is the standard for quality print output and is selected by default. Use 72 dpi for screen previews, 150 dpi for draft prints, and 600 dpi for very fine detail work. The layer info panel shows the effective print DPI of your image at its current size — aim for at least 150 dpi, ideally 300+.

Select your layer, then type the exact width and height into the W and H fields in the right sidebar under Position & Size. Make sure your units (mm/cm/in) are set correctly in the left sidebar first. Enable Lock aspect ratio to scale proportionally.

Select the layer, then type X and Y coordinates into the position fields. X and Y measure the distance from the top-left corner of the paper to the top-left corner of your image. You can also drag directly on the canvas. Enable Snap to Grid (🧲 in the toolbar) for grid-aligned positioning.

Yes. Click Add Image in the left sidebar or drag multiple files into the upload zone. Each image becomes its own layer. Use the layer panel on the right to select, reorder, show/hide, or delete layers. You can move and resize each one independently.

Click 💾 Save Session in the toolbar or export panel. This downloads a .toscale file to your device containing all your layers and settings. To resume, click 📂 Load Session and open that file — everything will be restored exactly as you left it.

Contain — fits the entire image inside the box, maintaining aspect ratio (may show gaps). Cover — fills the entire box, maintaining aspect ratio (may crop). Stretch — forces the image to fill the box exactly, ignoring aspect ratio. For templates and technical drawings, use Contain or Stretch.

No. All processing is done locally in your browser. Images you upload never leave your device. See our Privacy Policy for full details.

ToScale accepts PNG, JPG, WEBP, and SVG files. For best print quality, use the highest resolution source image you have. The editor shows the effective print DPI so you can see if your image is high enough resolution for the size you've chosen.

Once the page has loaded in your browser, the editor works fully offline. The fonts and jsPDF library are loaded from CDNs on the first load, but after that no network connection is required.